Guillermo,sorry for the delay,as I suspected the measurements are off from Speedways.
I can't even talk to the guy that installed my crossmember as to why he fitted it further forward.
We don't talk any more as a consequence of some other 'issues' with other work he did to my truck.
That also explains why my chassis didn't need clearanced for the steering rack arms!
How far off are the Speedway measurements from the stock axle centreline on your truck?